Principles and Circuits

O B J E C T I V E S

Principles

• Explain what a liquid is and how liquids differ from solids and gases.
• Explain how force is transmitted through a liquid.
• Define the following terms: pressure, head, atmospheric pressure, vacuum, laminar flow, turbulent flow, velocity, and flow rate.
• Describe the relationship between pressure and flow in a hydraulic system.

Circuits

• List the main components of a basic hydraulic circuit and describe the function of each component.
• Describe the basic operation of an automatic venting circuit.
• Describe the basic operation of an accumulator circuit.
• Describe the basic operation of a regenerative circuit.

S U B J E C T S

Principles

• Characteristics of Liquids
• Pressure and Flow

Circuits

• Circuit Components
• Typical Hydraulic Circuits